So with planar adventures there's more to just adventuring for gold and power. The way I see it one of the big things I can see planar adventurers going after is the quest for enlightenment...
However enlightenment is different for each individual character... It's an intensely personal thing tied to the characters background and motivation, but from enlightenment what should a character get beyond something that fulfills a player's roleplaying satisfaction. Should it be more than just XP?
Maybe it's just me, being someone who's well-versed in White Wolf's Mage RPGs where power is tied to enlightenment, but what should a character get for pursuing enlightenment D&D style?
And what are some things that characters should have to do when pursuing enlightenment?
The factions are paths to enlightenment, of course. Any path to enlightenment should probably be a sect or faction in Planescape.